The development of high-efficiency earth-rich and non-precious metal catalysts for oxygen evolution reactions is a critical and essential challenge. In this paper, Fe-doped NiCoP is prepared by phosphating iron-doped NiCo Prussian blue analogs (Fe-NiCo PBA) as a highly effective catalyst for electrocatalytic oxygen evolution reaction (OER). Fe-NiCoP exhibits superior OER performance with a low overpotential (266 mV at 10 mA cm⁻²) owing to the synergistic effect of Fe doping and phosphating. The Fe doping mainly decreases the energy barrier of the OH* dehydrogenation step, while phosphating significantly reduces the energy barrier of the OH adsorption step. This work reveals the mechanism of the synergistic effect of Fe doping and phosphating on catalysts and provides a new strategy for synthesizing metal-doped transition metal phosphides.

开发用于析氧反应的高效富土和非贵金属催化剂是一项关键且必不可少的挑战。在本文中，Fe 掺杂的 NiCoP 是通过磷化铁掺杂的 NiCo 普鲁士蓝类似物 (Fe-NiCo PBA) 制备的，作为电催化析氧反应 (OER) 的高效催化剂。Fe-NiCoP 表现出优异的 OER 性能和低过电势（10 mA cm 时为 266 mV ^-2）由于Fe掺杂和磷化的协同作用。Fe掺杂主要降低了OH*脱氢步骤的能垒，而磷化显着降低了OH吸附步骤的能垒。该工作揭示了Fe掺杂和磷化对催化剂的协同作用机理，为合成金属掺杂过渡金属磷化物提供了新的策略。